[Cleanup] Remove StringPrintf from global namespace

chrome/browser/sync_file_system/drive_file_sync_service_sync_unittest.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/sync_file_system/drive_file_sync_service.h"
 
 #include <algorithm>
 
 #include "base/format_macros.h"
 #include "base/message_loop.h"
@@ skipping 170 matching lines @@
     fake_sync_client_ = NULL;
     sync_service_.reset();
     fake_remote_processor_.reset();
     message_loop_.RunUntilIdle();
   }
 
   void AddOrUpdateResource(const std::string& title) {
     typedef ResourceIdByTitle::iterator iterator;
     std::pair<iterator, bool> inserted =
         resources_.insert(std::make_pair(title, std::string()));
-    if (inserted.second)
-      inserted.first->second = StringPrintf("%" PRId64, ++resource_count_);
+    if (inserted.second) {
+      inserted.first->second =
+          base::StringPrintf("%" PRId64, ++resource_count_);
+    }
     std::string resource_id = inserted.first->second;
 
     fake_sync_client_->PushRemoteChange(
         kParentResourceId, kAppId, title, resource_id,
-        StringPrintf("%" PRIx64, base::RandUint64()),
+        base::StringPrintf("%" PRIx64, base::RandUint64()),
         false /* deleted */);
     message_loop_.RunUntilIdle();
   }
 
   void DeleteResource(const std::string& title) {
     ResourceIdByTitle::iterator found = resources_.find(title);
     if (found == resources_.end())
       return;
     std::string resource_id = found->second;
     resources_.erase(found);
@@ skipping 179 matching lines @@
     CreateRemoteFileAddOrUpdateEvent(kFile1),
 
     CreateFetchEvent(),
     CreateProcessRemoteChangeEvent(),
     CreateRelaunchEvent(),
   };
   RunTest(CreateTestCase(sync_event));
 }
 
 }  // namespace sync_file_system